JP2021511252A - A rotary transmission device that transmits control pressure and / or operating pressure to a wheel hub or a vehicle wheel supported by the wheel hub. - Google Patents

Abstract

A rotary transmission device that transmits control pressure and / or operating pressure to a wheel hub or a vehicle wheel supported by a wheel hub. The rotary transmission device has a housing structure, in which the piston member is attached to the housing structure and a rotating body of a wheel hub attached so as to rotate around the wheel axis with respect to the housing structure. On the other hand, it can be displaced between the first position and the second position. At least one pressure medium passage is formed in the piston member to transmit control pressure and / or working pressure. At the first position of the piston member, there is a gap between the end face of the piston member on the rotating body side and the end face of the rotating body on the piston member side, while at the second position of the piston member, the piston on the rotating body side. There was no gap between the end face of the member and the end face of the rotating body on the piston member side, and at least one pressure medium passage of the piston member was sealed to at least one pressure medium passage formed in the rotating body. Open in the state.

Description

Comprehensively, the present invention relates to a system for transmitting control pressure and / or working pressure, particularly in a wheel unit with rotatably mounted wheel tires. According to embodiments of the invention, the invention particularly relates to a rotary transmission device that transmits control pressure and / or operating pressure to a wheel hub or wheel rim supported by a wheel hub.

The present invention further comprises a wheel unit comprising such a rotary transmission device for transmitting control pressure and / or working pressure, and a plurality of corresponding rotary transmission devices for transmitting control pressure and / or working pressure. It relates to a distributed system that supplies a pressure medium with a wheel unit.

Vehicle tires are typically filled with compressed air. It is also conceivable to fill with other pressurizing media, such as nitrogen. In the present disclosure, the vehicle tire may be, for example, a tube type tire or a tubeless tire. Vehicle tires are used, for example, in automobiles, buses, trucks, and also in aircraft.

Conventional vehicle tires are typically supplied with a pressure medium, such as compressed air or nitrogen filling, via an external port. A standard valve is usually used for this purpose. Vehicle tires usually have an optimum operating pressure or filling pressure according to their respective operating conditions or operating conditions. For example, for land vehicles such as automobiles, buses, or trucks, the operating pressure or pressure range to the extent that optimal conditions for rolling resistance, lateral guides, longitudinal guides, heat generation, and / or wear behavior can be guaranteed. Is applied.

The actual pressure present in the tire can fluctuate within certain limits, for example with ambient or operating temperature. Moreover, certain pressure drops, known as pressure drops that occur unknowingly over a long period of time, are often unavoidable altogether. Systems for vehicles that allow monitoring of operating pressure or filling pressure in tires are known. These systems can be active or passive.

Passive systems can be designed, for example, to determine the rolling circumference of an axle tire and compare them to each other. If there is a significant difference, it indicates that there is a pressure difference in each tire. Active systems that measure and / or monitor compressed air typically include a pressure monitoring sensor integrated into the wheel unit. Such pressure sensors can also be designed, for example, to transmit the corresponding pressure signal from the (rotating) tires wirelessly or by wire to the fixed components of the vehicle.

Further, in principle, systems are known that allow autonomous adjustment of the filling pressure of vehicle tires. Such systems are used, for example, in all-terrain vehicles, military vehicles, or similar specialty vehicles. The system can, in principle, be configured to allow adjustment of the filling pressure when the vehicle is stationary, i.e. when the vehicle is not moving.

Known systems for autonomous pressure control in vehicles have a central structure. This, in other words, means that there is only one device to provide the pressure medium to fill the tire. For example, for a combination of a tractor unit and a trailer or semi-trailer, it can be envisioned to provide some device that supplies a pressure medium. Nevertheless, such a central supply of compressed air is intended to fill multiple wheel units, especially on different axles. For this, the central supply unit of compressed air or pressure medium must be connected to multiple wheel units. Therefore, the supply unit is typically located in the chassis or body of the vehicle or in the superstructure. The supply unit may include, for example, a compressor or an air compressor. Here, it is necessary to lay a plurality or a large number of compressed air lines or pressure medium lines starting from the supply unit to each wheel unit. For this purpose, a plurality of so-called rotating passages must usually be provided for the pressure medium line. This is because the tires of the wheel unit are usually rotatably attached to the axle of the vehicle.

As a general rule, transmitting the corresponding control and / or operating pressure from a unit mounted in the center of the vehicle to the wheel hub or wheel rim supported by the wheel hub is a wheel with a wheel hub and a wheel for the vehicle. It is relatively difficult and complex because the unit is mounted so that it rotates around the wheel axis. Known rotary transmitters are very prone to wear, so to date central pressure medium feeders in vehicles have not been widely used, especially due to significant additional and running costs.

In this regard, the present invention is based on the object of improving the rotary transmission device of the type described at the beginning, which is characterized by high robustness and has almost no effect on the vehicle when not in use. In addition, rotary transmitters are resistant to wear and are characterized by outstanding durability.

The object on which the present invention is based is achieved by the subject matter of independent claim 1 in accordance with the present invention. An advantageous improved form of the rotary transmission device is given in the dependent claims.

Accordingly, the present invention includes a rotary transmission device that transmits control pressure and / or operating pressure to a wheel hub or a vehicle wheel supported by the wheel hub. The rotary transmission device has a housing structure, within which the piston member runs the housing structure and a wheel hub attached so as to rotate about the wheel axis with respect to the housing structure. It can be displaced between the first position and the second position with respect to the body). At least one pressure medium passage is formed in the piston member to transmit control pressure and / or working pressure.

According to the embodiment of the present invention, in particular, at the first position of the piston member, there is a gap between the end face of the piston member on the rotating body side and the end face of the rotating body on the piston member side, while the piston member. In the second position of the above, there is no gap between the end face of the piston member on the rotating body side and the end face of the rotating body on the piston member side, and at least one pressure medium passage of the piston member is formed in the rotating body. It is intended to be sealed (to the atmosphere) into at least one pressure medium passage.

The subject matter of the present invention is particularly characterized in that the piston member does not come into contact with the rotating body of the wheel hub and therefore does not wear when the rotary transmission device is not used.

In the embodiment of the rotary transmission device according to the present invention, in particular, when the piston member applies the corresponding control pressure on the end face on the side opposite to the end face on the rotating body side, the air can be transferred to the second position. It is characterized in that it is formed as an actuated piston member. In this regard, it is particularly preferred that the piston member be movable relative to the housing structure and rotating body by the application of the corresponding control pressure. Here, the control pressure is particularly different from the transmitted control pressure and / or working pressure. This control pressure and / or working pressure is the control pressure and / or working pressure for a component in the wheel hub or vehicle wheel.

According to the embodiment, a control pressure port is provided so that the control pressure is supplied to and discharged from the control chamber assigned to the piston member, if necessary. The control chamber is formed in at least a part of the region, particularly by the side surface of the piston member on the opposite side of the end face of the piston member on the rotating body side.

When the rotary transmission system according to the embodiment of the present invention is used, not only the pressure can be transmitted to the wheel hub or the vehicle wheel supported by the wheel hub, but also the pressure is supported by the wheel hub or the wheel hub. The control chamber is intended to be airtightly separated from at least one pressure medium passage formed within the piston member to ensure that it can also be transmitted from the vehicle wheel.

According to the embodiment of the rotary transmission device according to the present invention, in the end region on the rotating body side, the piston member includes a sealing member, and this sealing member is, in at least a part of the region, the piston member on the rotating body side. An end face is formed, preferably at least one pressure medium passage that is axially configured with respect to the pressure medium passage formed in the piston member and opens into the pressure medium passage formed in the piston member. .. Therefore, in such an embodiment, it is intended that when the rotary transmission device is not used, the seal member provided for sealing the pressure medium transmission to the external atmosphere does not wear.

In this regard, when at least one pressure medium passage formed in the seal member has a diameter larger than the diameter of at least one pressure medium passage formed in the piston member at least at the end face of the piston member on the rotating body side. Is advantageous. In the case of this embodiment, when the rotary transmission device is used, that is, when the piston member is in the second position, even if the rotating body is not optimally oriented with respect to the housing structure of the rotary transmission device, it is inside the rotating body. It is ensured that safe pressure medium transmission to at least one pressure medium passage formed can be achieved.

The present invention is not limited to embodiments in which the piston member has only one pressure medium passage. Rather, in the present invention, at least two or more pressure medium passages are formed in the piston member, and these pressure medium passages are provided in the end region of the piston member on the rotating body side or form the end region thereof. It is clear that it also relates to embodiments that open into the corresponding pressure medium passages within the sealing member.

In particular, the present invention relates to and / or seals at least one pressure medium passage formed in the rotating body, opened in the end face of the rotating body on the piston side, and formed in the piston member. With respect to at least one pressure medium passage formed in the member, with the piston member in the second position, preferably a flow path or flow path sealed to the external atmosphere was formed in the piston member. It also relates to an embodiment configured to form from at least one pressure medium passage to at least one pressure medium passage formed in the rotating body.

According to a preferred embodiment of the rotary transmission device according to the present invention, the housing structure has at least one pressure medium port, through which control pressure and / or working pressure is applied. It can be supplied to at least one pressure medium passage formed in the piston member. Here, at least in a state where the piston member is in the second position, a pressure medium distribution passage exists between the end face of the piston member on the opposite side of the end face of the piston member on the rotating body side and the inner wall of the housing structure. At least one pressure medium port opens in this passage.

It is preferred that a sealing mechanism be assigned to the piston member so as to seal the piston member against the pressure medium distribution passage. Similarly, it is advantageous if the sealing mechanism is assigned to the piston member so as to seal the piston member against the housing structure.

According to an embodiment of the rotary transmission device according to the present invention, a pre-biasing member, preferably in the form of a spring member or the like, is assigned to the piston member that pre-urges the piston member at the first position. It is advantageous that the pre-emptive forces can be adjusted accordingly.

According to the embodiment of the present invention, the housing structure, the piston member, the seal member provided in the end region on the rotating body side, and the rotating body are each formed as an annular body and coaxial with the wheel shaft. Be placed. In other words, the rotary transmission device is designed as a substantially annular body. This makes it possible to use it on an axle that is driven without the need for a drill shaft and hub. At the same time, due to both changes, a small installation space between the wheel bearings and the wheel hub is used as the installation location.

In this regard, at least one pressure medium passage formed within the piston member can also be configured as an annular passage. Thus, the same applies to at least one pressure medium passage in the sealing member on the rotating body side or in the end region of the piston member on the rotating body.

It is advantageous that the piston member can be formed as an pneumatically operated piston member that can shift to a second position when a corresponding control pressure is applied, particularly to the end face on the side opposite to the end face on the rotating body side. is there. Here, the control pressure can correspond to the control pressure and / or the working pressure transmitted to the wheel hub or the rotating body of the wheel hub, or the control pressure is correspondingly a separate control pressure in the housing structure. Supplied through the port.

Alternatively, it is clear that it can be assumed that the piston member can be formed as an electromagnetically actuable piston member.

According to embodiments, the system according to the invention relates to at least three control units, a seal plug, a check valve, a connection to a tire, a push rod seal, a piston spring, a piston seal, a vent bore, and a rotary transmission device. A pressure selection control module with a connection is further provided.

At least one of at least three control units differs from the other control units of at least three control units in static position. This position is characterized by the position of the check valve. In particular, in the system according to the invention, the spring of the check valve is preliminarily urged at a stationary position in at least one of the three control units, thereby closing the valve in this control unit. Is intended. In this regard, in this example according to the invention, the control unit can be driven by _{the specified control pressure (p SB) of at least one of the three control units.} As a result of at least one of the three control units being in this position, the other control units of the at least three control units have a valve open position.

At least three control units of the pressure selective control module can be characterized by having the same corresponding piston surface area. This forces at least three springs of at least three check valves to be urged to continuously switch from tire pressure input to purge bore connection when the control pressure rises continuously. Is guaranteed to be.

The term "rotary transmitter" or "rotary passage" generally refers to a connection that allows transmission of control and / or working pressure regardless of the position of rotation of the wheel / rim insert with respect to the outlet.

The present invention further comprises a pressure medium supply system for a multi-track vehicle comprising at least two vehicle wheels each provided with a rotary transmission of the type described above for transmitting control pressure and / or working pressure. ..

It is understood that the features listed above and the features described below can be used alone in other combinations as well as in the given combinations without departing from the scope of the invention.

Further features and advantages of the present invention will be understood by the following description of an exemplary embodiment with reference to the accompanying drawings.

It is a schematic and greatly simplified top view of a vehicle equipped with a central pressure medium supply system. FIG. 1 is a schematic, significantly simplified form of an air circuit diagram of a portion of the central pressure medium supply system of FIG. It is a top view of the wheel hub side of an exemplary embodiment of the rotary transmission device according to the present invention. It is a schematic cross-sectional view along the line AA of FIG. It is a schematic enlarged view extracted from FIG. It is a schematic diagram extracted from FIG. 5, and here, an exemplary embodiment of the rotary transmission device according to the present invention is in a non-operating state. It is a schematic and greatly simplified form of an air circuit diagram of a pressure selection control module in a pressure medium supply system. It is sectional drawing of the pressure selection control module. It is a simplified view of the check valve in at least one of at least three control units shown in FIG. FIG. 8 is a cross-sectional view according to FIG. 8, wherein an exemplary embodiment is in a stationary state. FIG. 8 is a cross-sectional view according to FIG. 8, wherein in one exemplary embodiment, pressure is released from the tire. FIG. 8 is a cross-sectional view according to FIG. 8, wherein in one exemplary embodiment, pressure is released from the tire. FIG. 8 is a cross-sectional view according to FIG. 8, wherein in one exemplary embodiment, pressure is released from the tire. FIG. 8 is a cross-sectional view according to FIG. 8, wherein in one exemplary embodiment, pressure is released from the tire.

FIG. 1 shows a schematic, significantly simplified top view of the vehicle 10. FIG. 1 shows an automobile as an example. Alternatively, it is understood that the vehicle 10 can be designed as a utility vehicle or generally a land vehicle. The disclosure is not limited to land vehicles. For example, it can be assumed to be used in an aircraft equipped with a traveling device.

The chassis or body of the vehicle 10 is indicated by 12.

The vehicle 10 includes a plurality of axles 14-1 and 14-2 that are offset from each other in the longitudinal direction of the vehicle. The vehicle 10 shown in FIG. 1 is a two-axle vehicle. It is understood that not only multi-axle vehicles (trucks that can be configured with three or four axles) but also single-axle vehicles (eg, semi-trailers, trailers, etc.) are included in the scope of this disclosure. Will be done.

It is understood that the vehicle 10 can generally be designed as a powered vehicle. However, the vehicle 10 can also be a vehicle towed or towed, especially a trailer, a semi-trailer, or the like. The vehicle 10 shown in FIG. 1 is a multi-truck vehicle, particularly a two-truck vehicle. However, the present disclosure can also relate to single truck vehicles (motorcycles, scooters, etc.).

The vehicle 10 includes four vehicle wheels 16, two of which are assigned to axles 14-1 and 14-2, respectively. Vehicle wheels are indicated clockwise by 16-1, 16-2, 16-3, 16-4.

The vehicle 10 includes an integrated (vehicle-mounted) pressure medium supply system 20. The pressure medium supply system 20 is shown graphically only in FIG. 1 by a block diagram. The pressure medium supply system 20 includes a pressure medium supply device in the form of a pump 21 and a pressure medium intermediate storage unit 22 (see the air circuit diagram in FIG. 2).

The vehicle wheel 16 typically holds a tire that can be filled with a pressure medium. Tires are usually filled with air. However, it can be assumed that the tire is filled with nitrogen or the like. In a centrally designed pressure generator of the pressure medium supply system 20 to monitor, control, and adjust the pressure level in the tires of the vehicle wheels 16, each vehicle wheel 16 is equipped with a rotary transmission device 25 (FIG. 2) is provided, and the rotary transmission device 25 can be used to supply the pressure medium from the central pressure generator of the pressure medium supply system 20 to the vehicle wheel 16.

Therefore, the pressure medium supply system 20 can be directly or indirectly connected to the rotary transmission device 25 electrically or hydraulically. This connection can also function for the transmission or information exchange and control of electrical energy.

As an example, the pressure medium supply system 20 comprises a control device 26, which either comprises a signal processing unit 20 and an energy storage unit 28 or is coupled to the signal processing unit 20 and the energy storage unit 28. The control device 26 can be connected to, for example, the main energy storage unit (main battery) of the vehicle 10. Alternatively, it can be assumed that a separate energy storage unit 28 is provided to the control device 26 or that a separate energy storage unit 28 is connected to the control unit 26.

The signal processing unit 27 can be designed as part of the overall vehicle control system. Alternatively, the signal processing unit 27 can be configured as a separate module. The control device 26 is configured to monitor the condition of the vehicle wheels 16, especially the tires, to establish whether a pressure medium is needed. This can be done by direct or indirect monitoring of the tire pressure on the wheel 16. Thus, the control device 26 is such that one or more rotary transmission devices 25 are actuated, preferably pneumatically or optionally electrically, in order to achieve the desired pressure in the tire of the wheel 16. Can be configured.

Alternatively or additionally, the rotary transmission device 25 can be configured to autonomously maintain a particular target state or range with respect to the pressure in the tires of the vehicle wheel 16. No external control commands are required in this operating state. A combination form is also conceivable, firstly to generate a central control signal for pressure control and secondly to enable at least partially distributed autonomous control during an emergency operation, for example.

According to the example shown in FIG. 1, the pressure medium supply system 20 can be connected or connected to the rotary transmission device 25 via the air line 29. The line 29 is specifically configured to transmit control pressure and / or working pressure to the rotary transmission device 25. In addition, the line 29 can also be designed and configured as an electrical line that transmits information, signals, measurements, parameters and the like. It is also understood that some lines can be provided for energy transfer and information transfer.

According to FIG. 1, the pressure medium supply system 20 is connected to the first rotary transmission device 25-1 via the first line 29-1, and the second rotary type via the second line 29-2. To the transmission device 25-2, to the third rotary transmission device 25-3 via the third line 29-3, to the fourth rotary transmission device 25-4 via the fourth line 29-4. Connected or can be connected.

The pressure medium supply system 20 is configured to adjust the pressure or air pressure in the tires of the wheels 16 during the operation of the vehicle 10. Therefore, it is not necessary to decelerate or stop the vehicle 10 to adjust the pressure in the tires. Instead, the rotary transmission device 25 is configured to be able to change the pressure even during relative rotation between the vehicle wheel 16 and the vehicle axle 14.

The control device 26 of the pressure medium supply system 20 is configured to detect pressure loss, which detection preferably includes identifying tire damage. For this purpose, for example, a given pressure over a specific period of time can be used as a threshold for failure or tire damage.

In addition, the pressure medium supply system 20 is configured to monitor the pressure in the tires of the wheels 16 over time. In this way, seasonal (temperature-induced) pressure fluctuations or natural long-term pressure drops on the wheel 16 can be detected and compensated. Further use of the pressure medium supply system 20 can be obtained by adjusting the pressure in the wheel 16 as targeted. For example, in this way, it is possible to respond to different load conditions, axle loads, road surface conditions, weather conditions, and the like.

FIG. 2 schematically shows a circuit diagram of the concept of the pressure control type rotary transmission device according to FIG.

The central control unit (control device 26) schematically shown in this exemplary embodiment comprises a corresponding sensor receiver having a power input. The control unit 26 is connected to the (center) pressure medium supply device 21 in the form of a pump to operate the pressure medium supply device 21 as needed. The pressure side output of the pressure medium supply device 21 can be fluid connected to the pressure accumulator 22 to store or temporarily store the control pressure and / or the working pressure.

The pressure side output from the pressure accumulator 22 or the pressure medium supply device 21 is connected to the valve block 23 for the control pressure of the rotary transmission system via the corresponding pressure medium line system 29-1. The pressure side output from the pressure accumulator 22 or the pressure medium feeder 21 via the additional pressure medium line system 29-2 is to ensure tire filling and ventilation of the correspondingly assigned wheel unit 6. , Further connected to the valve block 24. Corresponding filling and venting lines lead from valve blocks 23, 24 to the rotary transmission device 25, shown only graphically in FIG. The rotary transmission device 25 provides a pressure controlled rotary transmission device between the wheel bearing and the corresponding hub of the wheel unit 6.

It is noted here that the components housed in the blocks drawn by the dotted lines form the components required for each wheel unit 6.

An exemplary design of a rotary transmission device 25 that transmits control pressure and / or operating pressure to a vehicle wheel supported by a wheel hub 1 will be described in more detail below with reference to FIGS. 3-6. This exemplary embodiment of the rotary transmission device 25 can be used, for example, in the pressure medium supply system 20 shown in FIG.

In detail, FIG. 3 shows a top view of the wheel hub side of an exemplary embodiment of the rotary transmission device 25 according to the present invention.

FIG. 4 shows a schematic cross-sectional view taken along line AA of FIG. Here, the rotary transmission device 25 is in a pressure-operated state. FIG. 5 shows a schematic enlarged view extracted from FIG.

FIG. 6 schematically shows a portion extracted from FIG. Here, an exemplary embodiment of the rotary transmission device 25 according to the present invention is in an inactive state.

Briefly, in an exemplary embodiment of the rotary transmission device 25 according to the present invention, the piston member 3 is displaceable between a first position and a second position with respect to the housing structure 2. It is provided with a housing structure 2 housed in. At the same time, the piston member 3 is also configured to be displaceable with respect to the rotating body 4 of the wheel hub 1 which is attached to the housing structure 2 so as to rotate about the wheel shaft 14.

At least one pressure medium passage 5 (exactly one in the drawing) is formed within the piston member 3 that transmits the control pressure and / or the working pressure.

In the non-operating state (see FIG. 6), the piston member 3 is in the first position, and at this position, the end surface 6 of the piston member 3 on the rotating body side and the end surface 7 of the rotating body 4 of the wheel hub 1 on the piston side. There is a gap S between and.

On the other hand, in the pressure-operated state of the rotary transmission device 25, the piston member 3 is in the second position, and this position is the end face 6 of the piston member 3 on the rotating body side and the rotating body 4 of the wheel hub 1 on the piston side. There is no gap between the end face 7 and at least one pressure medium passage 5 of the piston member 3 is formed in the rotating body 4 (see FIGS. 4 and 5) in at least one pressure medium passage 5 (see FIGS. 4 and 5). Open in a sealed state (to the outside atmosphere).

The pressure selection control module according to FIG. 7 forms a connection between the pressure medium supply system A and the tire B via an air line. In an exemplary embodiment, the pressure selection control module is embedded in at least three control units and at least one of the at least three control units and at least one control piston 18 whose movement can be set by a spring. It consists of.

According to FIG. 7, the pressure selection control module monitors the pressure supply regulated by the pressure medium supply system. To this end, the tire pressure can be set to accommodate the resistance of the surface on which the tire rolls. Thus, for example, on wet roads, the tire pressure can be adapted to give the vehicle good grip.

Simplified diagrams of exemplary embodiments are shown in FIGS. 11A, 11B, 11C, and 11D. FIG. 11A shows a stationary state of an exemplary embodiment. At this position, one of at least one of the three control units, eg, the control unit 14 in the example of FIG. 11A, comprises a pre-biased spring member, while the other control units 12 and 15 are urged. Equipped with no spring member. This resting state in this exemplary embodiment corresponds to at least one open control unit and at least two control units are closed. Such a condition does not allow air to be supplied to or exhausted from the tire.

The closed control unit 14 in the exemplary embodiment also has a vent bore 22 that releases the received tire pressure to the atmosphere. As a result, the control unit 15 connected to the control port 23 can receive the air that can be conveyed to the tire via the pressure selection control module.

FIG. 11B of an exemplary embodiment shows a state in which at least two of the at least three control units of the pressure selective control module are open and at least one control unit is closed. According to FIG. 11B, the control unit 15 is in the closed position. In this state, the air from the tire can be released into the atmosphere. This reduces the tire pressure of the vehicle. The position of the control unit 12 here corresponds to the position of the control unit 14.

Another possibility of the pressure selective control system according to the exemplary embodiment in FIG. 11C corresponds to a so-called locking condition. This state of this embodiment corresponds to a position where the control unit 12 connected to the tire is open and the other control units are closed. In this locked state, the air emitted from the tire can be released to the atmosphere, but the air cannot be supplied to the tire.

An exemplary embodiment shown in FIG. 11D shows the supply of air to the tires. This state is characterized in that the control units 12 and 15 are open and the control unit 14 is closed. Since the control unit 14 is closed and the control unit 15 is open, the air supply guided from the control port A enters the tire because the control unit 12 is connected to the tire port 16.

As shown in the drawings, in an exemplary embodiment of the rotary transmission device 25 according to the present invention, the piston member 3 is located on the rotating body side in at least a part of the region, particularly in the end region on the rotating body side. It is intended to include a seal member 8 on which the end face 6 of the piston member 3 is formed and at least one pressure medium passage 9 is formed. At least one pressure medium passage 9 formed in the seal member 8 is axially configured with respect to the pressure medium passage 4 formed in the piston member 3, and at least one pressure formed in the piston member 3. It is preferable to open the medium passage 5.

In particular, in an exemplary embodiment of the rotary transmission device 25 shown in the drawings according to the present invention, at least one pressure medium passage 9 formed in the seal member 8 is at least on the end face 6 on the rotating body side. , It is intended to have a diameter greater than the diameter of at least one pressure medium passage 5 formed within the piston member 3.

As already shown, in the exemplary embodiment of the rotary transmission device 25 shown in the drawings according to the present invention, at least one pressure medium passage 11 is also formed in the rotating body 4 of the wheel hub 1. .. The passage is open to the end surface 7 of the rotating body 4 on the piston side, and is related to at least one pressure medium passage 5 formed in the piston member 3, or at least one pressure medium passage 9 formed in the seal member 8. With respect to, in a state where the piston member 3 is in the second position (see FIGS. 4 and 5), at least one flow path or flow path that is preferably sealed to the external atmosphere is formed in the piston member 3. It is configured so as to be formed from one pressure medium passage 5 to at least one pressure medium passage 11 formed in the rotating body 4.

The housing structure 2 of the rotary transmission device 25 according to the present invention further has at least one pressure medium port 13, and controls pressure and / or operating pressure is transmitted into the piston member 3 through the pressure medium port 13. It can be supplied to at least one pressure medium passage 5 formed. At least in the state where the piston member 3 is in the second position, that is, in the state of the pressure-operated rotary transmission device (see FIGS. 4 and 5), the pressure medium distribution passage 15 is the end face of the piston member 3 on the rotating body side. It exists between the end face of the piston member 3 on the opposite side of 6 and the inner wall of the housing structure 2, and at least one pressure medium port 13 opens in this passage.

In this regard, it is advantageous that the sealing mechanism 30 is assigned to the piston member 3 in order to seal the piston member 3 against the pressure medium distribution passage 50. Similarly, in an exemplary embodiment shown in the drawings, it is intended that a (further) sealing mechanism 31 is assigned to the piston member 3 in order to seal the piston member 3 against the housing structure 2. ..

The housing structure 2, the piston member 3 in which the seal member 8 is provided in the end region on the rotating body side, and the rotating body 4 are each formed in an annular shape and are arranged coaxially with the wheel shaft 14. Therefore, at least one pressure medium passage 5 formed in the piston member 3 is configured as an annular passage. Therefore, the same thing applies to the pressure medium passage 9 formed in the seal member 8 provided in the end region of the piston member 3 on the rotating body side, and at least one pressure medium passage 11 in the rotating body 4 of the wheel hub 1. Also applies.

In an exemplary embodiment shown in the drawings, the piston member is configured as a pneumatically actuated piston member 3, which control controls particularly on the end face opposite to the end face on the rotating body side. By applying pressure, it shifts to the second position.

In this regard, it can be assumed that the pre-energizing member (not shown in the drawing) is assigned to the piston 3 in order to return or pre-energize the piston member 3. The pre-energizing member preferably includes a spring member or the like.

The pneumatically actuated piston member 3 preferably shifts to a first position or a second position by a control pressure, whereby this control pressure is supplied to the pressure medium distribution passage 15. For this reason, it is advantageous that the corresponding control pressure port 18 is formed within the housing structure 2.

In an exemplary embodiment shown in the drawings according to the present invention, in particular, the piston member 3 is in a second position when a corresponding control pressure is applied, particularly to the end face on the side opposite to the end face on the rotating body side. It is intended to be formed as a pneumatically operated piston member capable of transitioning to. For this reason, in particular, the piston member 3 is movable with respect to the housing structure 2 and the rotating body 4 by applying the corresponding control pressure, and in particular, this control pressure is transmitted by the rotary transmission device 25. It is intended to be different from the control pressure and / or operating pressure. Thus, this allows the piston member 3 to operate independently of the transmitted control and / or operating pressure, thereby allowing the rotary transmission device to transfer the controlled and / or operating pressure to the wheel hub. It is advantageous that it is possible not only to transmit to the vehicle wheel supported by 1 or the wheel hub 1, but also to transmit from the vehicle wheel supported by the wheel hub 1 or the wheel hub 1. In particular, the piston member 3 can be positioned completely independently of the transmitted control pressure and / or operating pressure.

In an exemplary embodiment shown in the drawings, for this purpose, control pressure on the piston member 3 is supplied to and released from the control chamber 19 assigned to the piston member 3, as needed. Therefore, the control pressure port 18 described above is provided. The control chamber 19 is formed by the side surfaces of the piston member 3 in at least a part of the region. This side surface is preferably located on the opposite side of the end surface 6 of the piston member 3 on the rotating body side. On the other hand, it is clear that the other side surface of the piston member 3 can be used to demarcate the control chamber 19.

In particular, in the embodiment of the rotary transmission device 25 shown in the drawings according to the present invention, the control chamber is airtightly separated from at least one pressure medium passage 5 formed in the piston member 3.

However, as an alternative, the pneumatically actuated piston member 3 can be moved to the corresponding second position by the transmitted working pressure, which working pressure is delivered through the pressure medium port 13 through the pressure medium distribution passage 15. It can be assumed that it will be supplied to.

Therefore, in summary, the present invention relates to a tire pressure control system capable of increasing or decreasing the tire pressure of individual wheels of a vehicle. This system includes a compressed air rotary transmission system that has been modified so that the seal members do not come into contact when not in use and therefore wear does not occur. The rotary transmission system is preferably formed as an annular body. In this way, it is possible to use axles that are driven without the need to drill or otherwise modify the shafts and hubs. At the same time, due to both changes, a small installation space between the wheel bearing and the wheel hub 1 is used as the installation location. By using different control pressure levels in a single passage system or multiple pressure passages, wheel side control functions can be achieved without the need for electrical valves. The above changes also ensure that there is no friction when not in use.

The system according to the present invention also has, in particular, an annular housing (stator), an annular piston with a seal member optionally arranged radially or axially, and an optionally radial or axial contact surface with the seal member. It is provided with a rotating body 4 (rotor). The system can be configured with one or more passages, if desired. When the control pressure is transmitted to the rotating body 4 (rotor), the annular piston can come into contact with the same or separate control pressures as needed. After the sealing member comes into contact with the rotating body 4, different pressures and pressure levels optimized for wear can be transmitted. Further, in the deformed form sealed in the axial direction, it is possible to compensate the wear volume of the sealing member by the designed piston stroke length, and to guarantee the long life and function of the rotary transmission device 25. If a separate switchable pressure is used in the piston stroke, the piston can also return to the desired state. For this reason, the working chamber of the piston is ventilated during air transmission. Here, the pressure of the transmitted air can fully return the piston with the area surrounded by the seal lip.

The system according to the present invention is designed and configured as part of a tire pressure control system that transmits separate control and / or operating pressures to vehicle wheels. In addition, the system is configured to detect tire pressure and / or tire temperature and transmit the detected single or multiple values to the control device. In addition, the system is configured to fill or exhaust the tires connected to the vehicle wheels, as needed.

1 Wheel hub 2 Housing structure 3 Piston member 4 Rotating body 5 Pressure medium passage 6 End face 7 End face 8 Seal member 9 Pressure medium passage 10 Vehicle 11 Pressure medium passage 12 Control unit 13 Pressure medium port 14 Control unit 15 Control unit 16 Wheel 18 Control Piston 19 Control chamber 20 Pressure medium supply system 21 Pressure medium supply device 22 Pressure accumulator 23 Valve block 24 Valve block 25 Rotary transmission device 26 Control device 27 Signal processing unit 28 Energy storage unit 29 Air line 30 Seal mechanism 31 Seal mechanism

Claims (20)

In a rotary transmission device that transmits control pressure and / or operating pressure to a wheel hub (1) or a vehicle wheel supported by the wheel hub (1), the rotary transmission device (25) has a housing structure ( 2), within the housing structure (2), the piston member (3) is relative to the housing structure (2) and around the wheel shaft (14) relative to the housing structure (2). It is displaceable between the first position and the second position with respect to the rotating body (4) of the wheel hub (1) mounted so as to rotate, and the control pressure and / or the operating pressure. At least one pressure medium passage (5) is formed in the piston member (3), and at the first position of the piston member (3), the piston member (3) on the rotating body side is formed. There is a gap (S) between the end face (6) of the piston member (6) and the end face (7) of the rotating body (4) on the piston member side, while the second position of the piston member (S). Then, there is no gap between the end surface (6) of the piston member (3) on the rotating body side and the end surface (7) of the rotating body (4) on the piston member side, and the piston member. A rotary transmission device (25) in which at least one pressure medium passage (5) of (3) opens in a sealed state in at least one pressure medium passage (11) formed in the rotating body (4). ). The piston member (3) is movable with respect to the housing structure (2) and the rotating body (4) by applying a corresponding control pressure, and the control pressure is transmitted to the control pressure and the rotating body (4). / Or the rotary transmission device (25) rotary transmission device according to claim 1, which is different from the operating pressure. The rotation according to claim 2, wherein a control pressure port (18) is provided so that the control pressure is supplied to the control chamber (19) assigned to the piston member (3) and discharged from the control chamber (19). Type transmission device (25) A rotary type transmission device. A claim formed by the control chamber (19), preferably in at least a part of a region, formed by a side surface of the piston member (5) on the opposite side of the end surface (6) of the piston member (3) on the rotating body side. Item 3. The rotary transmission device (25) rotary transmission device according to item 3. The rotary transmission device (25) according to claim 3 or 4, wherein the control chamber (19) is airtightly separated from the at least one pressure medium passage (5) formed in the piston member (3). ) Rotary transmitter. In the end region on the rotating body side, the piston member (3) includes a sealing member (8), and the sealing member (8) is the piston member (3) on the rotating body side in at least a part of the region. The end face (6) of the above is formed, preferably formed in the piston member (3) in the axial direction with respect to the pressure medium passage (5) formed in the piston member (3). The rotary transmission device (25) rotary transmission device according to claim 1, wherein at least one pressure medium passage (9) that opens in the pressure medium passage (5) is formed. The at least one pressure medium passage (9) formed in the seal member (8) is formed in the piston member (3) at least on the end surface (6) of the piston member (3) on the rotating body side. The rotary transmission device (25) according to claim 2, which has a diameter larger than the diameter of the formed at least one pressure medium passage (5). The rotary transmission device (25) according to claim 2 or 3, wherein at least two pressure medium passages are formed in the piston member (3) and open in the corresponding pressure medium passages in the seal member (8). .. At least one pressure medium passage (11) is formed in the rotating body (4), opens in the end face (7) of the rotating body (4) on the piston side, and is formed in the piston member (3). With respect to the at least one pressure medium passage (5) formed and / or with respect to the at least one pressure medium passage (9) formed in the seal member (8), the piston member (3) is second. In the state of, preferably, the flow path sealed with respect to the external atmosphere is formed from the at least one pressure medium passage (5) formed in the piston member (3) to the rotating body (4). ), The rotary transmission device (25) according to any one of claims 1 to 4, which is configured to be formed up to at least one pressure medium passage (11). The housing structure (2) has at least one pressure medium port (13), and the control pressure and / or operating pressure is applied to the piston member (3) through the at least one pressure medium port (13). The piston member (3) on the rotating body side can be supplied to the at least one pressure medium passage (5) formed inside, and the piston member (3) is in the second position. A pressure medium distribution passage (15) exists between the end face of the piston member (3) on the opposite side of the end face (6) and the inner wall of the housing structure (2), and at least one of the above is provided in the passage. The rotary transmission device (25) according to any one of claims 1 to 4, wherein the pressure medium port (13) is opened. A sealing mechanism (30) is assigned to the piston member (3) so as to seal the piston member (3) to the pressure medium distribution passage (15), and / or the sealing mechanism (31). The rotary transmission device (25) according to claim 7, which is assigned to the piston member (3) so as to seal the piston member (3) with respect to the housing structure (2). A pre-energizing member is assigned to the piston member (3) so as to pre-force the piston member (3) to a first position, and the pre-biasing member preferably includes a spring member. The rotary transmission device (25) according to any one of the items to 4. The housing structure (2), the piston member (3), the seal member (8) in the end region of the piston member (3) on the rotating body side, and the rotating body (4) are The rotary transmission device (25) according to any one of claims 1 to 4, which is formed as an annular body and is arranged coaxially with the wheel shaft (14). The rotary transmission device (25) according to any one of claims 1 to 4, wherein the at least one pressure medium passage (5) formed in the piston member (3) is configured as an annular passage. The pneumatically operated piston member (3) can shift to a second position when a corresponding control pressure is applied to the end surface of the rotating body side opposite to the end surface. The rotary transmission device (25) according to any one of claims 1 to 4, wherein the piston member (3) is formed as an electromagnetically actuated piston member (3). The housing structure (2) has at least one pressure medium port (13), and the control pressure and / or operating pressure is applied to the piston member (3) through the at least one pressure medium port (13). The piston member (3) on the rotating body side can be supplied to the at least one pressure medium passage (5) formed inside, and the piston member (3) is in the second position. A pressure medium distribution passage (15) exists between the end face of the piston member (3) on the opposite side of the end face (6) and the inner wall of the housing structure (2), and at least one of the above is provided in the passage. The rotary transmission device (25) according to claim 5, wherein the pressure medium port (13) is opened. 6. A pre-energizing member is assigned to the piston member (3) so as to pre-force the piston member (3) to a first position, and the pre-energizing member preferably includes a spring member. Or the rotary transmission device (25) according to 7. The housing structure (2), the piston member (3), the seal member (8) in the end region of the piston member (3) on the rotating body side, and the rotating body (4) are The rotary transmission device (25) according to claim 6 or 7, which is formed as an annular body and is arranged coaxially with the wheel shaft (14). The rotary transmission device (25) according to claim 6 or 7, wherein the at least one pressure medium passage (5) formed in the piston member (3) is configured as an annular passage. The pneumatically operated piston member (3) can shift to a second position when a corresponding control pressure is applied to the end surface of the rotating body side opposite to the end surface. The rotary transmission device (25) according to claim 6 or 7, wherein the piston member (3) is formed as an electromagnetically actuated piston member (3).

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